Calculateur d'Angle de Brewster Gratuit
Calculez l'angle de Brewster pour la polarisation de la lumière. Trouvez l'angle d'incidence de polarisation complète.
Brewster Angle
56.31 °
Brewster Angle vs Refractive Index 1
Formule
Brewster's Angle
At Brewster's angle, reflected light is completely polarized, with the reflected and refracted rays perpendicular to each other.
Formula
theta_B = arctan(n2 / n1)
At this angle, the reflected light contains only the s-polarization (perpendicular to the plane of incidence).
Exemple Résolu
Light reflecting off glass (n=1.5) from air (n=1).
- 01theta_B = arctan(n2/n1)
- 02theta_B = arctan(1.5/1)
- 03theta_B = arctan(1.5)
- 04theta_B = 56.31°
Questions Fréquentes
What is polarized light?
Light in which the electric field oscillates in a single plane. Unpolarized light oscillates in all directions perpendicular to propagation.
Why do polarized sunglasses reduce glare?
Glare from flat surfaces (road, water) is predominantly horizontally polarized. Polarized sunglasses block horizontal polarization, reducing glare.
Is Brewster's angle used in lasers?
Yes. Brewster windows in laser tubes minimize reflection losses for one polarization, creating a linearly polarized laser beam.
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